diff --git a/sys/dev/usb/serial/uchcom.c b/sys/dev/usb/serial/uchcom.c
--- a/sys/dev/usb/serial/uchcom.c
+++ b/sys/dev/usb/serial/uchcom.c
@@ -155,6 +155,14 @@
 
 #define	UCHCOM_BULK_BUF_SIZE 1024	/* bytes */
 
+/*
+ * As speeds for uchcom devices increase, these numbers will need to
+ * be increased. This needs to be tested.
+ *
+ * TODO: The TTY buffers should be increased!
+ */
+#define	UCHCOM_BUF_SIZE 1024
+
 enum {
 	UCHCOM_BULK_DT_WR,
 	UCHCOM_BULK_DT_RD,
@@ -242,6 +250,28 @@
 static usb_callback_t uchcom_read_callback;
 
 static const struct usb_config uchcom_config_data[UCHCOM_N_TRANSFER] = {
+	[UCHCOM_BULK_WR] = {
+		.type = UE_BULK,
+		.endpoint = UE_ADDR_ANY,
+		.direction = UE_DIR_TX,
+		.if_index = 0,
+		.bufsize = UCHCOM_BUF_SIZE,
+		.flags = {.pipe_bof = 1,.force_short_xfer = 1,},
+		.callback = &uchcom_write_callback,
+		.usb_mode = USB_MODE_DUAL,
+	},
+
+	[UCHCOM_BULK_RD] = {
+		.type = UE_BULK,
+		.endpoint = UE_ADDR_ANY,
+		.direction = UE_DIR_RX,
+		.if_index = 0,
+		.bufsize = UCHCOM_BUF_SIZE,
+		.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
+		.callback = &uchcom_read_callback,
+		.usb_mode = USB_MODE_DUAL,
+	},
+
 	[UCHCOM_BULK_DT_WR] = {
 		.type = UE_BULK,
 		.endpoint = UE_ADDR_ANY,
@@ -673,6 +703,12 @@
 uchcom_cfg_open(struct ucom_softc *ucom)
 {
 	struct uchcom_softc *sc = ucom->sc_parent;
+	
+	/* clear stall */
+	if ((sc->sc_super_ucom.sc_flag & UCOM_FLAG_DEVICE_MODE) == 0) {
+		usbd_xfer_set_stall(sc->sc_xfer[UCHCOM_BULK_WR]);
+		usbd_xfer_set_stall(sc->sc_xfer[UCHCOM_BULK_RD]);
+	}
 
 	DPRINTF("\n");